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Given y = 2sin(θ) and x = 3cos(θ) find dy/dx.

The function is defined parametrically so we usually approach these questions using chain rule.Recall that: dy/dθ * dθ/dx = dy/dx So we will need to differentiate each expression individually then multiply t...
JC
Answered by Jacob C. • Maths tutor
5691 Views

work out 3 1/2 - 2 1/3. Give answer as an improper fraction

change everything to sixths. 21/6 - 14/6 = 7/6
MS
Answered by Maiya S. • Maths tutor
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which of these angles is obtuse?

An obtuse angle is an angle that is greater than 90degrees but less than 180 degrees. when looking at the diagram all angles apart from B are acute (as they are less than 90 degrees) Therefore B is the obtus...
MS
Answered by Maiya S. • Maths tutor
3211 Views

How can I find the normal to a curve at a given point?

Take the curve y = 2x 2 - 4 and point P (2,4) . a) First, find the straight line tangent to the curve at point P . This will have the gradient of the curve at point P . To find it, differentiate: dy/dx = 4x ...
AP
Answered by Artyom P. • Maths tutor
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What are the factors that affect the rate of a chemical reaction?

For a reaction to occur molecules must collide with energy greater than or equal to the activation energy, in the correct orientation. The factors affecting the rate of a reaction are: Pressure of reacting g...
AJ
Answered by Amelia J. • Chemistry tutor
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